改进的构造曲率法在伊朗卡山地区Aran背斜库姆组裂缝研究中的应用
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摘要
Aran背斜是伊朗卡山区块主要勘探目标,前期勘探已揭示其目的层库姆组C4亚段为一套典型的裂缝性储层.在Aran背斜三维地震构造精细解释基础之上,利用并改进构造线曲率法,五点二次拟合法,对贯穿该构造的276条剖面开展了曲率计算,并编制了C4段顶最大曲率平面分布图.结合断裂系统分布,总结出该构造裂缝发育主要分布在背斜的长轴、高点及北西倾伏端,依据曲率值分布,将该背斜划分为3个裂缝带,并依次对其进行了评价,揭示了裂缝发育分布规律.上述认识对该构造的进一步勘探具有参考意义.
Aran anticline is the main exploration target in the Kashan Block in Iran.The C4 sub-member of the Qom formation has already been proved a set of typical fractured reservoir by previous exploration activities.In this paper,based on fine structure interpretation on 3D seismic data covering Aran anticline,using an improved tectonic line curvature with five-point twice fitting,we conducted curvature calculation of 276 profiles covering this structure,and then mapped the maximum curvature distribution diagram of the top of the C4 sub-member.In the combination of the fault system distribution,our research indicates that the structural fractures mainly developed along the long axis,in the high part and NW plunging of this fold.In term of the curvature value,we mapped 3 fracture zones on this anticline and conducted evaluation on them,revealing the development and distribution law of fractures within this fold.These understandings are beneficial for further exploration for this structure.
Aran anticline is the main exploration target in the Kashan Block in Iran.The C4 sub-member of the Qom formation has already been proved a set of typical fractured reservoir by previous exploration activities.In this paper,based on fine structure interpretation on 3D seismic data covering Aran anticline,using an improved tectonic line curvature with five-point twice fitting,we conducted curvature calculation of 276 profiles covering this structure,and then mapped the maximum curvature distribution diagram of the top of the C4 sub-member.In the combination of the fault system distribution,our research indicates that the structural fractures mainly developed along the long axis,in the high part and NW plunging of this fold.In term of the curvature value,we mapped 3 fracture zones on this anticline and conducted evaluation on them,revealing the development and distribution law of fractures within this fold.These understandings are beneficial for further exploration for this structure.
引文
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[3]夏在连,刘树根,王国芝,等.中伊朗盆地卡山地区Aran构造带油气成藏[J].油气地质与采收率,2008(2):24-26.
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[8]李德同,文世鹏.储层构造裂缝的定量描述和预测方法[J].石油大学学报:自然科学版,1996(4):6-10.
[9]周文.埕岛中东部潜山带古生界和太古界储层裂缝分布评价[J].矿物岩石,2000(1):52-56.
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[12]戴弹申.构造曲率是勘探裂缝性气藏的有效方法[J].天然气工业,1982(4):21-26.
[2]李进龙,王世虎.伊朗卡山探区Arun背斜圈闭的地球物理评价[J].中国海洋大学学报,2004(4):611-616.
[3]夏在连,刘树根,王国芝,等.中伊朗盆地卡山地区Aran构造带油气成藏[J].油气地质与采收率,2008(2):24-26.
[4]G.H.Murray.Quantitative fracture study;Sanish pool,McKenzie county,North Dakota[J].AAPG Bulletin(1):57-65.
[5]王仁,丁中一,殷有泉.固体力学基础[M].北京:地质出版社,1979.
[6]曾锦光,罗元华,陈太源.应用构造面主曲率研究油气藏裂缝问题[J].力学学报,1982(2):202-206.
[7]丁中一,钱祥麟,霍红.构造裂缝定量预测的一种新方法——二元法[J].石油与天然气地质,1998(1):1-17.
[8]李德同,文世鹏.储层构造裂缝的定量描述和预测方法[J].石油大学学报:自然科学版,1996(4):6-10.
[9]周文.埕岛中东部潜山带古生界和太古界储层裂缝分布评价[J].矿物岩石,2000(1):52-56.
[10]王允诚,等.裂缝性致密油气储集层[M].北京:地质出版社,1992.
[11]周新桂,邓宏文,操成杰,等.储层构造裂缝定量预测研究及评价方法[J].地球学报,2003(2):175-180.
[12]戴弹申.构造曲率是勘探裂缝性气藏的有效方法[J].天然气工业,1982(4):21-26.
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